I was at home and since I have a loaner 4G Wifi setup from @thestuffguy, I figured I’d do some tests.
First the 3G MobiPCS Hele direct to my MacBook:

Then the Sprint phone tethered directly to the MacBook, also 3G:

The 4G Clear modem via Cradlepoint PHS300 wireless router (802.11g):

And finally, good old fashioned RoadRunner over an 802.11n (high band) connection:

Some interesting results. One thing to keep in mind is that 4G coverage is, in my experience, very spotty on island compared to 3G.
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